2Choice of implant

General consideration

For retrograde femoral nailing to achieve adequate fracture stabilization,
the fracture should be at least 6 cm from the joint line to achieve distal
locking with two transverse screws or a screw and a spiral blade. In contrast,
more distal fixation can be achieved with plates, or locked fixators. For
example the distal most screws in a LISS plate, or a condylar plate, may be
subchondral.